Pipe-threading machine.



-No. 654,46I. lPa'ten'fecl July 24, |900. H. KOESTER.

PIPE THREADING MACHINE.

(Application led''an. 15, ISOJ (No Model.) i 5 Sheets-She'et I.

No. 654,46l. Patented lilly 24, |900.

H KOESTER v PIPE THREADING MACHINE. (Application med nn. 15, 1900.) (NoBudel.) i 5 Sheets-Sheet 2.

W1 111255 E S No. 654,46l.

Patented July 247 |900.

H'. KOESTER.

PIPE THREADING MACHINE.

(Animation-med Jan. 151'900.) (No Model.)

' 5 Sheets-Sheet 4.

Illmul Hm No. 654,464. Patente-d my 24, |900. H. KOESTER.

PlPE THREADING MACHINE. (Application filed Jan. 15, 1900.)

(Nolodeln 5 Sheets-Shut 5.

, are mounted upon slidable driving-shafts ATENT QFFICE@ A HENRYKOESTER, or orIIcAeo", ILLINOIS, ASSIGNOR To rrIIE ORANEOOM- PANY, onSAME PLACE.

PIPE-THRr-:Aome MACHINE.

, srEoIFIcaTIolv` lforming para 0f Letters.V Patent Nc. 654,461, datedJury 24, 1900. `applicati@ fina January 15, 1900..A sean No. 1,583. unman.)

To all whom it may concern:

Be it known that I, HENRY KOESTER, a citi zen of the United States,residing in Chicago, Cook county, Illinois, haveinveuted a certain newand Improved VPipe-Threading Machine, of which the following, taken incon# nection with the accompanying drawings, is a specication.

My invention relates to machinery for threading pipes or tubes, and hasfor its object, primarily, the construction of a machine of this classwhich will be applicable to pipes of considerable length-as, forexample, the most common sizes, which run from about fourteen toeighteen feet.

My machine is intended to take care of pipes of varying lengthsindiscriminately within a certain reasonable limit-that is, it isespecially designed for use where a large number of pipes requirethreading, among which are various lengths, running all the way from,say, fourteen to twenty feet, depending partly upon the amount of wastematerial that has been cut away after the pipe is drawn. Itis not newwith me to thread two ends of a short nipple by a machine operating uponthe same at both ends simultaneously, nor is it new with me to provide amachine capable of threading simultaneously the opposite ends of a .pipeor tube, broadly speaking; but, so far as I am aware, the priorconstructions referred Ito require a fixed adjustment of the head-blocksand are capable of use only on pipes or tubes of a fixed orpredetermined length, and before a pile of tubes can be put through sucha machine they must all be cut to thevexact length for which the machineisset, unless for each variation in length there be an adjustment of oneor both of the head-blocks with relation to the bed of the machine,which obviously involves the expenditureof so much time as to make suchmethod of operation commercially impraci tical.

Another object of my invention is the provision of a machine in whichthread-cutting dies may be moved upto position against the opposite endsof a pipe to be threaded,whether such pipe be long or short, without theneed of any adj ustme'ntof either of the head-blocks. In order toaccomplish this object, the dies carried by the headiblocks, the wholebeing provided Withhand-operated mechanism for moving the dies up to andaway from the pipe.

A further object of my invention is the pro- Vision of mechanism,incombination with that alreadydescribed,whereby the dies are caused toautomatically collapse when the proper length of thread has been cut andmeans for regulating the length of such thread with precision andfacility.

The hand-operated mechanism referred to I arrange approximately near themiddle of the machine, so that it will be readily accessible to theoperator from such position and connect with the movable dies in a manner Which will be more fully hereinafter eX- plained. Another object ofmy invention is the combination, with a pipe-threading machine, of meansfor lifting the pipe outof the machine after it has been threaded, suchmeans comprising, essentially, a pair of supporting-levers arrangedunder the pipe and provided With mechanism for elevating them in amanner to raise the pipe out of its position in the machine and cause itto roll off laterally to make way for another pipe in the same posi#tion.

The above, as Well as such other objects as may hereinafter appear, Iattain by means of a construction which I have illustrated in preferredform in the accompanying drawn4 ings, in Whichi Figure l is a plan vien7embodying my invention. Fig. 2 is a side elevation thereof, showing theparts in position before the dies have been moved up against the ends ofthe pipe. Fig. 3 is a View showing the parts in the position occupiedwhen the dies have just automatically collapsed. Fig. 4L is an enlargedview showing one of the dies and the carriage mechanism. which controlsthe collapsing thereof. Fig. 5 isa plan view of the die. Fig. 6 is aface view thereof; Fig. 7, an end View of the carriage which transmitsmotion to the die. Fig. Sisan enlarged view of the hand operatingdevices. Fig. 8? is a section showing a detail of the same ;A Fig. 9, aplan View thereof; Fig. l0, one of the supports which centers the pipein the machine. Fig. ll illustrates the mechanism for srs ICO

removing the pipe from the machine after it and Fig. 13 is a plan Viewof the pipe-clamp.

Referring now more particularly to Figs. 1, 2, 3, and 4, it will be seenthat in the construction of my machine I provide aY bed 1,

upon which are mounted head-blocks 2, carrying shafts 3, which areslidably mounted in feather engagement with the sleeves 4 and providedwith taperor conical collars 5. The shaft 3 and sleeve 4 are caused torotate by driving mechanism comprising, essentially, a belt-pulley 6, aback shaft 7, and a suitable set or sets of gears 8, as shown in Fig. l.Upon the inner ends of the shafts 3 are mounted die-heads 9, carryingthread-cuttin g collapsible dies 10, operated by levers ll, 1

which bear against the collar 5, that surrounds the shaft. (See Fig. 4.)The shafts 3 are provided with a feathered or other suitable slidabledriving device in order to permit them to be moved endwise relative tothe sleeves and head-blocks while the latter are ixed,and the collar- 5has some endwise movement relative to the shaft 3.

As a means for operating the die-heads in moving them up to or away fromthe ends of the pipe I provide the carriage 12, carrying an arm 13,which engages the collar 5 in such a manner as to move the same alongthe shaft 3, but not interfere with the rotation of the collar. Thecarriage 12, by means of the antifriction-rollers 14, is mounted upon arod 15, between a fixed abutment 16 and an adj ustable collar 17. 18 toa couple of racks 19, (see Fig. 2,) which engage a pinion 20, that isarranged to be driven from a hand-wheel 21. (See Figs. 8, 8, and 9.)

Adjacent to the Wheel 2l there is keyed to the shaft thereof afriction-wheel 22, adapted to coperate with two friction-pawls 23 and24, of which the latter, 24, is pivotally mounted in a bell-crank lever25,the other end of which, 26, is provided at 27 with a slot thatengages a pin 28, which imparts motion to the other friction-pawl 23,which is normally held out of contact with the friction-wheel by meansof the spring 29.

Fast to the pawl 24 I provide a hand-lever 30 for throwing the said pawlinto engagement with the friction-wheel 22. The pawl 24 is normally heldout of engagement with the wheel 22 by means of the small spring 31.Upon the outer ends of the rods 15 are pivotally mounted the tail-levers32, cooperating at one end with the collars 33 on the ends of the shafts3 and adapted at their other ends to strike against the brackets orstops 34, which are secured to the floor. The purpose of the tail-leversis to reset the thread-cutting dies when they are thrown out away fromthe ends of the pipe after a thread has been cut and the dies havecollapsed.

Upon the bed 1 are secured a couple of sockets or bases 35, in which areadjustably put in position.

The rods 15 have connections.

mounted the Y-shapedv supports- 36, having upon their stems thelocking-nuts 37, this mechanism comprising the means for supporting andcentering the pipe in the machine. In brackets 38, fastened to theiioor, are mounted a couple of levers 39, operated from a foot ortreadle piece 40, the levers 39 being attached to rods 41, which passupwardly and are secured to cross-levers 42, (see Fig, 11,) which arepivotally mounted in brackets '43, secured to the bed of the machine.When the pipe 44 is in position to be threaded, the lever 42 is in theposition shown in full lines in Fig. 11. After the threads have been cuta downward pressure on the treadle 40 will raise the pipe 44 upon theend of the lever 42 until the lever 4 2 occupies the position shown indotted lines in Fig. 11, when the pipe will roll down and off at the endover the back shaft 7, making way for another pipe to be Upon the bed ofthe machine I also mount clamping mechanism for holding the pipe inposition, comprising a base 45 and a pair of jaws 46, operated by atoggle-lever device 47, as shown in Figs. 12 and 13.

Within the die-heads 9 I arrange a cutter 48 for trimming off the bur onthe inside of the pipe, the said cutter being, as shown in Fig. 4, heldin operative position against the tension of a spring 49, so that as thethread is cut the critter, which is not arranged to cut on the end ofthe pipe, can yield to permit the pipe to enter farther into the die. Toget the pipe centrally into the die, l provide a ring 50, having thereina conical recess.

The operation of myinvention is as follows: The parts being in theposition shown in Figs. l and 2, a pipe is placed in the supports 36,the said supports beingadj usted for the proper size of pipe toaccurately center the same with reference to the dies. The hand-wheel 21is now turned, drawing the rods 15 inward, and by means of the carriages12 bringing the die-heads up against the ends of the pipe. It isapparent that it does not matter what the length of the pipe is so longas it comes within the variable range of the machine-that is, thevariation or movement of the die-heads permitted by the length of theshafts 3, which in the machine which I have constructed is approximatelyeight feet. It is also evident that it'does not matter whether the pipeis dropped into the supports 36 a little nearer to one end than theother of the machine, as the rotation of the hand-wheel 21, through rod15, collar 17, and carriage 12, will push the pipe along until bothdie-heads are firmly in contact with the ends of the pipe. `The pipehaving been moved until both die-heads are in contact with the endsthereof is now clamped in position by movement of the toggle-lever 47,of the clamping device. (Shown in Figs. 12 and 13.) The thread is nowstarted by the operator pushing downwardly upon the handle 30, this .bythe engaging of the IIO friction-pawl 24 causing a rotation of thefriction-wheel 22, which carries with it the bell-crank lever 26 andbrings the other friction-pawl 23 up into position to lock the wheel 22against further movement. The parts are so adjusted that thelocking-pawl 23 will not stop the movement of the wheel 22 until thedieshave gotten sufficiently started in cutting threads upon the pipe toinsure the continuance of the cutting operation from the feed effect ofthe cutters themselves, which then causes the dies to continue toadvance inwardly, the pressure of the levers 11 on the collar 5 movingthe carriages 12 along, together with the collars 5, until the carriagesstrike the fixed abutments 1G, which prevent further movementof thecarriages on account of the rods 15 being locked through thelocking-paw] 23, and stopping the inward movement of the conical collars5 permits the dies to collapse automatically as the levers 11, Wherethey contact with the collars 5, ride down upon the conical facethereof. The dies having collapsed, the cutters are of course free fromengagement with the pipe, and the lever 30 is now pulled upward and theWheel 21 rotated to move the die-heads outwardly away from the ends ofthe pipe until the rods 15 have reached a point where the tail-levers 32will strike the brackets 3l, which will move the shafts 3 still fartherin an outward direction and cause the levers 11 of the collapsible diesto ride up again on the conical periphery of the collar 5 into theposition shown in Fig. 4, thus bringing the diecutters into positionready to cut another thread. The clamp-jaws 46 being opened, theoperator now pushes downwardly on the treadle 40, and raising the pipeby means of the levers 42 it rolls out of the way backwardly, and thetreadle being released and the levers 42 dropping again another pipe canbe put into position ready to be threaded.

From an examination ofthe drawings, and particularly Fig. 4t thereof, itwill be seen that by simply changing the position of the collar 17 uponthe rod 15 the length of thread which will be cut by the dies can bedetermined. The greater the lost motion between the carriage and thecollar 17 and the fixed abutment 16 the greater is the lengt-l1 ofthread that will be cut.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a pipe-threading machine, the combination with a bed, a headblockthereon, a slidable driving-shaft carried by said headblock, athread-cutting die carried by said shaft and mechanism for driving saidshaft,

of hand-operated mechanism for moving said die up to the end of thepipe, and hand-operated mechanism for starting the thread upon the pipecomprising a friction-Wheel, a driving-pawl for said friction-wheel, alocking-pawl, and means whereby the motion imparted to saidfriction-wheel by said drivingpawl brings the locking-pawl intoengagement to lock the friction-wheel against further motion,substantially as described.

2. The combination with a pipe-threading machine, of mechanism forremoving the threaded pipes therefrom comprisingI levers extending underthe pipeand mechanism for elevating said levers to lift the pipe out ofposition in the machine and by bringing said levers to an inclinedposition, permitting the pipe to roll off the levers, substantially asdescribed. 4 l

3. In a pipe-threading machine, the combi# nation with a bed, ahead-block thereon, a slidable driving-shaft carried by said head block,a screw-cutting die carried by said shaft, and mechanism for drivingsaid shaft, of hand-operated mechanism for moving said die up to the endof the pipe, and hand-operated mechanism separate from saidfirstmentioned hand operated mechanism for starting the thread upon thepipe, substantially as described.

4. In a pipesthreading machine, the `cornbination with a bed, ahead-block thereon, a slidable driving-shaft carried by said headblock,a screw-cutting die carried by said shaft, and mechanism for drivingsaid shaft, of hand-operated mechanism for moving said die upto the endof the pipe, and hand-operated mechanism separate from saidiirstmentioned hand operated i mechanism for starting the thread uponthe pipe, and means whereby the motion imparted to the dies by saidsecond hand-operated mechanism is automatically checked, substantiallyas described.

5. A pipe-threading machine comprisinga bed, head-blocks thereon,slidable drivingshafts carried by said head-blocks, cuttingdies upon theinner ends of said shafts, mechanism for driving said shafts,hand-operated mechanism for moving said dies into contact with the endsof the pipe, a second set of mechanism for starting the thread upon thepipe separate from said hand-operatedmechanism, and mechanismsubstantially as described, whereby said last-mentioned mechanism islocked in predetermined position to collapse the dies when the properlength of thread has been cut,substantially as set forth.

HENRY KOESTER.

Vitnesses:

F. O. BRIGHTLY,

JOHN E. JOHNSON.

IOC

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